Bobcat 953 Skid-Steer Loader Service Manual – 6724352 (11–95)

This workshop repair service manual PDF download for the 953 Bobcat Skid-Steer Loader has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to fully at every opportunity.

APPLICABLE MODELS :

Bobcat Loader 953

TABLE OF CONTENTS :

FOREWORD
SAFETY INSTRUCTIONS
SERIAL NUMBER LOCATIONS
DELIVERY REPORT
BOBCAT LOADER IDENTIFICATION
PREVENTIVE MAINTENANCE
HYDRAULIC SYSTEM
HYDROSTATIC SYSTEM
DRIVE SYSTEM
MAIN FRAME
ELECTRICAL SYSTEM
ENGINE SERVICE
BICS™ SYSTEM
SPECIFICATIONS
SERVICE MANUAL REVISIONS

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
P/N : 6724352 (11–95)
Total Pages : 342

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MAINTENANCE SAFETY
CONTENTS
FOREWORD
SAFETY INSTRUCTIONS
SERIAL NUMBER LOCATIONS
LOADER SERIAL NUMBER
ENGINE SERIAL NUMBER
DELIVERY REPORT
953 BOBCAT LOADER IDENTIFCATION
OPTIONS AND ACCESSORIES

PREVENTIVE MAINTENANCE
SERVICE SCHEDULE
LIFTING AND BLOCKING THE LOADER
Procedure
TRANSPORTING THE LOADER
Procedure
TOWING THE LOADER
Procedure
LIFT ARM SUPPORT DEVICE
Engaging the Lift Arm Support Device
Disengaging the Lift Arm Support Device
OPERATOR CAB
Description
Raising the Operator Cab
Lowering the Operator Cab
Emergency Exit
SEAT BAR RESTRAINT SYSTEM
Description
Seat Bar Inspection
Seat Bar Maintenance
REAR DOOR
Opening the Rear Door
Adjusting the Rear Door Latch
AIR CLEANER SERVICE
Replacing Filter Element
FUEL SYSTEM
Fuel Specifications
Filling the Fuel Tank
Fuel Filter
In–Line Fuel Filter
ENGINE LUBRICATION SYSTEM
Checking Engine Oil
Replacing of Oil and Filter
ENGINE COOLING SYSTEM
Checking the Coolant Level
Propylene Glycol
Cleaning the Cooling System
Removing Coolant From the Cooling System
ALTERNATOR BELT
Adjusting the Alternator Belt
USING A BOOSTER BATTERY (JUMP STARTING)
Procedure
HYDRAULIC/HYDROSTATIC SYSTEM
Checking and Adding Fluid
Hydraulic/Hydrostatic Filter Replacement
Case Drain Filter
Hydraulic Fluid Replacement
SPARK ARRESTOR MUFFLER
Cleaning Procedure
EXHAUST GAS PURIFIER (Optional)
Function
Cleaning the Exhaust Gas Purifier
TIRE MAINTENANCE
Wheel Nuts
Tire Rotation
Tire Mounting
FINAL DRIVE TRANSMISSION (CHAINCASE)
Checking and Adding Oil
LUBRICATING THE LOADER
Procedure
REMOTE START SWITCH
Procedure

HYDRAULIC SYSTEM
HYDRAULIC / HYDROSTATIC SCHEMATICS
TROUBLESHOOTING
HYDRAULIC SYSTEM INFORMATION
Flare Connections
O–Ring Face Seal Connection
Straight Thread O–Ring Fitting
Tubelines and Hoses
LIFT CYLINDER
Checking the Lift Cylinder(s)
Removal and Installation
Installation
TILT CYLINDER
Checking the Tilt Cylinder(s)
Removal and Installation
Tilt Cylinder Base End Pivot Pin
HYDRAULIC CYLINDER REPAIR
Disassembly
Assembly
Base and Rod End Seals
JUNCTION PORT BLOCK
Removal and Installation
QUICK COUPLERS (BRUNING)
Disassembly and Assembly
HYDRAULIC CONTROL VALVE
Removal and Installation
Remove Bucket Position Valve
Disassembly and Assembly
Valve Spool Linkage End O–ring (All Valve Sections)
Disassembly and Assembly
Lift Section Detent and Spool
Front Auxiliary Detent
Tilt and Rear Auxiliary Centering Spring
Anti–Cavitation Valve
Port Relief
CHARGE PUMP
Removal and Installation
Disassembly and Assembly
HYDRAULIC PUMP
Removal and Installation
Disassembly and Assembly
Inspection
HYDRAULIC RESERVOIR
Removing Fluid from the Reservoir
Removal and Installation
HYDRAULIC FILTER
Removal and Installation
Disassembly and Assembly
PORT BLOCK
Removal and Installation
Disassembly and Assembly
BUCKET POSITION VALVE
Removal and Installation
Disassembly and Assembly
FAN MOTOR
Removal and Installation
Disassembly and Assembly

HYDROSTATIC SYSTEM
TROUBLESHOOTING
LIFT AND TILT PEDALS
Removal and Installation
Pedal Cable Control Linkage
Pedal Lock Linkage
Adjustment
STEERING LEVERS AND SHAFT
Removal and Installation
HYDROSTATIC MOTOR
Removal and Installation
Disassembly and Assembly
Inspection
HYDROSTATIC PUMP
High Pressure and Replenishing Valves
Checking the High Pressure Relief Replenishing Valve
Checking Charge Relief Pressure
Removal and Installation
Disassembly and Assembly
Inspection
Neutral Adjustment
HYDROSTATIC FILTER
Removal and Installation
Disassembly and Assembly
Case Drain Filter
DRIVE BELT
Removal and Installation
Adjustment
DRIVE BELT TENSION PULLEY
Removal and Installation
CONTROL PANEL
Removal and Installation

DRIVE SYSTEM
PARKING BRAKE
Removal and Installation
Disassembly and Assembly
PARKING BRAKE DISC
Removal and Installation
AXLE SEAL AND WEAR RING
Removal and Installation
FRONT AXLE AND SPROCKET
Removal
Installation
REAR AXLE, SPROCKET AND DRIVE CHAIN
Removal
Installation
DRIVE CHAINS
Front Drive Chain Removal and Installation
Rear Drive Chains
REDUCTION GEARCASE
Removal and Installation
Disassembly and Assembly
CHAINCASE FLUID
Removal
CHAINCASE COVERS
Center Chaincase Cover Removal and Installation
Front Chaincase Cover Removal and Installation
Rear Chaincase Cover Removal and Installation

MAIN FRAME
OPERATOR CAB
Removal and Installation
OPERATOR CAB GAS CYLINDER
Removal and Installation
SEAT BAR
Removal and Installation
Assembly
Compressing the Gas Cylinder
REAR GRILL GAS CYLINDER
Removal and Installation
REAR DOOR
Removal and Installation
LIFT ARMS
Removal and Installation
Installation
BOB–TACH
Removal and Installation
Installation
Bob–Tach Wedges
Bob–Tach Lever
FUEL TANKS
Removal and Installation, Left Side
Removal and Installation, Right Side
Fuel Tank Pick–Up Hose
MAIN FRAME
Main Frame Bolts

ELECTRICAL SYSTEM
ELECTRICAL SCHEMATICS
TROUBLESHOOTING
ELECTRICAL SYSTEM INFORMATION
Description
BATTERY
Checking the Battery
Removal and Installation
ALTERNATOR
Alternator Output Test
Rectifier (Diode) Test
Alternator Regulator Test
Removal and Installation
Adjusting the Alternator Belt
Disassembly
Stator Continuity Test
Stator Ground Test
Rotor Continuity Test
Rotor Ground Test
Rectifier Continuity (Diode) Test
Assembly
STARTER (S/N 11375 & Below)
Removal and Installation
Checking the Starter
Disassembly and Assembly
Cleaning and Inspection
Parts Identification
STARTER (S/N 11376 & Above)
Removal and Installation
Parts Identification
Disassembly and Assembly
External Pinion
Inspection and Repair
Magnetic Switch Test
No Load Test
STANDARD INSTRUMENT PANEL
Removal and Installation
FRONT LIGHTS
Removal and Installation
RELAY SWITCHES
Location

ENGINE SERVICE
TROUBLESHOOTING
VALVE CLEARANCE
Adjustment
ENGINE COMPRESSION
Checking
FUEL FILTER
Removal and Installation
FUEL LIFT PUMP
Checking
Removal and Installation
REMOVING AIR FROM FUEL SYSTEM
Procedure
FUEL INJECTION PUMP
Removal and Installation
ENGINE TIMING TO INJECTION PUMP
Procedure
CHECKING TIMING MARK ON INJECTION PUMP FLANGE
Procedure
FUEL INJECTOR NOZZLES
Removal and Installation
ENGINE
Removal and Installation
RADIATOR AND OIL COOLER
Removal and Installation
ENGINE MUFFLER
Removal and Installation
EXHAUST GAS PURIFIER (Optional)
Function
Cleaning the Exhaust Gas Purifier
ENGINE MOUNTS
Removal and Installation
ENGINE FLYWHEEL
Flywheel Ring Gear
CYLINDER HEAD
Removing The Cylinder Head
Cylinder Head Surface Alignment
Installing The Cylinder Head
VALVES
Removal Of The Valves
Reconditioning The Valves And Valve Seats
Installing Valve Guides
Installing The Valve Seats
Checking The Valve Springs
ROCKER ARMS
Disassembly
Assembly
PISTON AND CONNECTING RODS
Removal
Disassembly
Inspection
Installation
CYLINDER LINERS
Removal
Installation
MAIN BEARING
Removal
Installation
Crankshaft End Play
CRANKSHAFT
Removal
Checking
Installation
REAR MAIN OIL SEAL
Removal and Installation
TIMING CASE COVER
Removal and Installation
IDLER GEAR AND HUB
Removal and Installation
CAMSHAFT GEAR
Removal and Installation
FUEL INJECTION PUMP GEAR
Removal and Installation
Installation
CRANKSHAFT GEAR
Removal
TIMING CASE
Removal and Installation
Installation
CAMSHAFT
Removal and Installation
Inspection
Installation
WATER PUMP
Disassembly of Water Pump
Inspection of the Water Pump
Assembly of the Water Pump
LUBRICATION SYSTEM
Description
BALANCER UNIT
Removal and Installation
Engine Timing to Balancer Unit
Oil Pump Removal and Installation
Oil Pump Inspection
Oil Pump Relief Valve
Disassembly and Assembly
Inspection

BICS™ SYSTEMS
BOBCAT INTERLOCK CONTROL SYSTEM (BICS™)
Inspecting the BICS™ System Controller (Engine STOPPED – Key ON)
Inspecting the Seat and Seat Bar Sensors (Engine RUNNING)
Inspecting the Traction Lock (Engine RUNNING)
Inspecting the Lift Arm By–Pass Control
Maintenance
Troubleshooting Chart
Troubleshooting Guide
BICS SYSTEM CONTROLLER
TRACTION LOCK
SEAT SENSOR
SEAT BAR SENSOR
LIFT LOCK BY–PASS VALVE
BICS™ SYSTEM CONTROLLER
Removal and Installation
Controller Test
SEAT BAR SENSOR
Removal and Installation
Seat Bar Sensor Test
SEAT SENSOR
Removal and Installation
Seat Sensor Test
TRACTION LOCK
Removal and Installation
LIFT LOCK BY–PASS VALVE
Removal and Installation
Disassembly and Assembly
TILT LOCK VALVE
Removal and Installation
Disassembly and Assembly

SPECIFICATIONS
SKID STEER LOADER SPECIFICATIONS
PERFORMANCE
CONTROLS
ENGINE
HYDRAULIC SYSTEM
ELECTRICAL
DRIVE SYSTEM
CAPACITIES
TIRES
FLOOR PRESSURE
VIBRATION DATA
ENGINE SPECIFICATIONS
Cylinder Head
Valve Guides
Exhaust Valves
Intake Valves
Valve Springs
Rocker Arms & Tappets
Piston & Piston Rings
Connecting Rod, Piston Pin & Bushing
Cylinder Block & Liners
Crankshaft, Main, Connecting Rod Bearings & Thrust Washer
Camshaft & Thrust Washer
Timing Case & Timing Gears
Oil Pump, Gear & Relief Valve
Cooling System & Water Pump
Fuel Lift Pump, Injection Pump & Injectors
De–Rating for Altitude
Balance Unit (Center Mounted)
Crankshaft Re–Grind Data
Engine Torque
Service Wear Limits
HYDRAULIC/HYDROSTATIC FLUID SPECIFICATIONS
DECIMAL AND MILLIMETER EQUIVALENTS
U.S. TO METRIC CONVERSION
STANDARD TORQUE SPECIFICATIONS FOR BOLTS

SERVICE MANUAL REVISIONS
950–1
950–2

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